Double-cylinder pump.



Patented Nov.` v|3, |900.

W. HULL.

DOUBLE CYLINDER PUMP.

(Application led May 15, 1900.) l

2 Sheets-Sheet I.

(No Model.)

Snuenfcw mill" No. 661,874. Patented Nov. I3, |900. i W. HULL.

DOUBLE CYLINDER PUMP.

(Applmtion led May 15, 1900.;

2 Sheets-Sheet 2.

(No Mode l.)

m: Nonms PETERS co. Pnuvmnmo, wAsmNsroN n c UNITED STATES g `PATENT OFFICE.

WARREN'A HULL, OF GASPORT, NEW YORK, ASSIGN OR OF TWO-TIHRDS TO ARTHUR B. HULL AND JOHN C. HULL, OF SAME PLACE.

DOUBLE-CYLINDER PUMP.

SPECIFICATION forming part of Letters Patent No. 661,874, dated November 13, 1900.

Application filed May l5, 1900. Serial No. 16,779. KNO model.)

To all whom it may con/cern:

Be it known that LWARREN HULL, acitizeu of the United States, residing at Gasport, in the county of Niagara and State of New York, have invented a new and useful Double-Oylinder Pump, of which the following is a specification.

My invention relates to improvements in double-cylinder pumps of that type wherein the pump-cylinders are mounted in alinement and within which reciprocate connected plungers operated by'actuating mechanism common to both for the purpose of pumping liquid or other iiud.

One object in View is to construct and arrange the elements of the pump in a novel manner in order to reduce the cost of manufacture and the expense incidental to the continued operation of the pump by simplifying the construction and by aggrouping its parts in a manner to attain the greatest possible efficiency with a minimum liability to wear and derangement.

Afurther object of my invention is to produce a high-pressure pump capable of being operated with a minimum expenditure of power and designed more especially for spraying fruit-trees and the like or for any other purpose requiring a projected stream or spray of fluid under high pressure.

Still another object is to provide for the adjustment of the packing while the pump is operating and for the insertion of new packing and the thorough cleaning of the operative parts without necessity for disorganizing the pump structure.

To the accomplishment of these objects the invention consists in the construction and arrangement to be hereinafter fully described, illustrated in the accompanying drawings, and embraced within the scope of the appended claims.

In the drawings, Figure l is a perspective view of my pump complete. Fig. 2 is a horizontal sectional viewV thereof. Fig. 3 is a vertical longitudinal section, and Fig. 4 is a transverse sectional View showing the upper end of the cqualizin g chamber or dome broken away.

Referring to the numerals of reference employed to designate corresponding parts in the several views, 1 indicates a hollow base, shell,

or casting of elongated rectangular form and comprising a bed-plate 2, supported on the slightly-inclined walls 3, having a foot-flange 4., which rests upon the [ioor or othersupport and may be bolted thereto. To one side of this hollow base is bolted thebolt-flanges 5 of a hollow lateral base-section 6, having its upper face 7 located in a horizontal plane below the bed-plate 2 and provided at its center with a substantially semispherical depression S, surrounded at its upper edge by an annular iiange 9, and from the lower portion of which depression or cavity 8 is led a dischargeport l0, opening through the side wall 1l of the lateral casting 6 opposite the base l. The elongated base 1 is designed for the support of the pump proper, and the lateral base-section is designed for the support of the equaliZing-chambemby means of which the pulsations of the pump are obliterated to secure a stuffing-boxes 18, which boxes are screwed upon the cylinders for the purpose of urging the glands against suitable packings 19, the compression of which prevents leakage around the plungers 20 and 2l. These plungers 20 and 2l are practically a single element, and I will therefore refer to that relatively rigid aggroupment of elements which com prehends these plungers as a double-headed plunger. This element, then, comprises what may be termed the medial plunger-shaft 22, which is a ilat metal bar provided at its opposite ends with cylindrical enlargements 23, the extremities of which are reduced to t into the opposed inner ends of the hollow plungersleeves 24, the outer end of each of which is closed by a head'25, retained in place by a comparatively long head-retaining bolt 26, passed through an axial opening in the head and having its inner extremity screwed into an axial recess 27, formed in the adjacent reduced end of the Shanks. This construction ICO of the plunger is simple and inexpensive, and it provides for the ready replacement of the wearing-surfaces, as the removal of either ofthe plunger-sleeves maybe quickly effected by the simple withdrawal of the bolt 26, which may be as quickly resecured to retain a new sleeve to compensate for the wear of the one displaced.

For the purpose of actuating the doubleheaded plunger to cause it to reciprocate with its opposite ends located in the cylinders I employ an oscillating pump rod or lever28, having its upper end provided with a handle 29 or otherwise adapted for the application ofl power, and having its deflected lower end 3`O``- straddling the shank 22, to which it is pivotall secured, as by the transverse bolt 3l, and

having the rise and fall of its lower extremity accommodated by' what may be termed an equalizing-arm 32, pivoted, as indicated at 33, between the lower ends of the pumprod bifurcationsland extendinghorizontally within the hollow base to a point adjacent to one end thereof, Where the bifurcated rear ends ofthe equalizing-arm are fulcrumed upon a transverse bolt 34, having its opposite ends retained in the side walls ofthe base 1. An

, elongated slot is provided in the bed-platel tion-pipesinto the cylinders, and 42"and 43' indicate similar check-valves located in the eduction-pipes 42 and 43 to prevent the fiuid frm-n being drawn back into the cylinde'S- The operation of my pump is as follows: 'The oscillation' of the pump-rod 28 by the applica-tion of power to its upper end effects the reciprocation of the double-headed plunger, the heads of which are located within the cylinders, and draws the liquid into the cylinders from the liquid-induction pipes 38 and 1 39 and forces it from the cylinders through the ed notion-pipes 42 and 43, fitting 44, and port 46 to the interior of the expansion or equalizing chamber 45, which serves to obliterate the pulsation of the pump and to permit the discharge of the liquid through the discharge-port l0 and pipe 5l in a continuous stream. By reason of the employment of the f swinging arm or equalizer 32 it is possible to dispense with any loose connections between the pump lever and plunger 'or between the lever and the part to which it is pivoted below the plunger, inasmuchas the rise and fall of the lower end of the lever incidental to its oscillation from the bolt 3l as a fulcrum will be accommodated by the vibration of the equalizer 32 upon the pivot 34.

From the foregoing it will be evident that my pump is so constructed that all of its parts may be easily cast and assembled in a manner to permit of their easy disassociation for the purpose of facilitating repair; but while the present' embodiment of mv invention ap- IOO iittings 40, the central port of each of which f communicates through a pendent nipple 41 with the outer end of the adjacent cylinder, at the under side thereof. From the ends of the fittings 40,opposite the induction-pipes 38 and 39,1 are led the eduction-pipes 42 and 43, screwed at their contiguous inner ends into the opposite extremities of the tangen-` tially-disposed fitting 44 of the equalizingchamber 45, with which the fitting communicates through a port 46. Y The fitting 44 is formed in the base-block 47 of the expansionpears at this time to be preferable I do not desire to limit myself to the structural details deiined, but reserve the right to change, modify, and vary such details within the scope of the protection prayed.

What I claim isl. In a pump, the combination with a base whose top constitutes a bed-plate, of a pair of coaxial cylinders carried thereby, a doubleheaded plunger movable within the cylinders, a hollow lateral base extension bolted to one side of the base and having a'discharge-port, a hollow base-block sur'mounting the extension, an equalizing-chamber surmounting the base-block, eduction-pip'es leading from the cylinders to the base-block, and inductionpipes ,leading to the cylinders.

ITO

chamber 45, the block being seated upon the upper surface of the lateral casting or base and bolted thereto, as by bolts 48, with thel annular flange 9 fitting snugly into the opening 49 of the block, which is internally screwthreaded for the reception of the threaded l lower end of the equaliZing-chamber`45,which itsupports. Thecoupling-nippleOisscreWed into the discharge-port l0 to effect the connection of a iiexible pipe or rother conduit 51, through which the water is forced to the point of use.

52 and 53 indicatecheck-valves located in each of the induction-pipes 38 and 39 for the purpose of preventing the back Iiow of the liquid after it has been drawn from the induc- 2. 1n a pump', the com blnatlon with a hollow base, whose top constitutes a bed-plate, of a pair of coaxial cylinders provided with a foot-plate bolted to the bed-plate, a doubleheaded plu nger movable within the cylinders, means for actuating said plunger, a hollow lateral base extension bolted to one side of the base and having its top surface located in a lower plane than the bed-plate, said lateral base extension being provided with a cavity in communication with a dischargeport, an annular Hange surrounding the cavity, a base-block seated upon the lateral base extension and su rrou ndingthe annular ange, an equalizing-chamber screwed into the baseblock directly over the cavity in the base extension, eduction-pipes leading from the cylinders to the base-block, and valve-con trolled induction-pipes leading to said cylinders.

3. The combination with a hollow base, the top of which constitutes a bed-plate, of a pair of coaxial cylinders having foot-plates bolted to the bed-plate of the base, a double-headed plunger movable in the cylinders, a pump-lever pivoted below the base and havinga pivotal connection with the plunger, a lateral base extension bolted to the base and having a cavity in communication with a dischargepoit and surrounded by an annular flange, a base-block bolted upon the face of the base extension, an equalizing chamber screwed into the base-block above the cavity and base extension, a nipple depending from the end yof each cylinder, a supply-pipe, valve-controlled induction-pipes communicating with the supply-pipe and the nipples, and liquideduction pipes communicating with the nipples and with the interior of the base-block of the eqnalizing-chamber.

4. In a pump, the combination with abase whose top constitutes a bed-plate, of a pair of coaxial cylinders mounted on the base, a double-headed plungei1 movable within the cylinders, a base extension at one side of the base and having a discharge-port, a,base block surmounting the extension and provided with oppositely-disposed pipe-couplings, an eXpansion-chambersurmounting the base-block, and induction and eduction pipes surrounding the base and having common/ connection at their end portions with the contiguous portions of the cylinders, the induetion-pipes being connected to a suitable supply-pipe and the eduction-pipes being connected to the couplings of the base-block.

In testimony that I claim the foregoing as my own I have hereto aflxed my signature in the presence of two Witnesses.

WARREN HULL.

Witnesses:

J. D. NORTHROP, M. A. MESLER. 

